Add django 4 support and bump django in requirements-server
It also enables to remove the version restriction on psycopg2.
Related to swh/infra/sysadm-environment#4772 (closed)
Staging instance, all changes can be removed at any time
It also enables to remove the version restriction on psycopg2.
Related to swh/infra/sysadm-environment#4772 (closed)